GraphQL language support

[langpavel]

Add GraphQL coloring and delegates block strings (mostly used for descriptions) to markdown

[msftclas]

All CLA requirements met.

[langpavel]

Hi @alexandrudima can you help me? If you can look and give me some clue, or if you can ask community for help..

I'm also curious if full language service for GraphQL can be easily implemented instead of this PR 🤔

I really wish Monaco editor as default in GraphiQL soon 🙂

[alexdima]

@langpavel I think starting small and slowly improving is definitely the right way to go about this! I am happy to help with specific technical questions, but I am sorry I don't have the necessary time to learn the GraphQL syntax and then help with the syntax highlighter per se.

But I can help with examples or specific questions.

Also, if you get only basic coloring working, I am happy to merge that in. We can always refine it later on, IMHO it doesn't need to be perfect to ship. I also don't really have a magic wand to gather contributors for this colorizer. The best is for your to bring it in some shippable state, then I can merge it, and then hopefully people start using it and then will want to come and improve it with other PRs.

[langpavel]

Hi @alexandrudima

I think that basic coloring working is there and it can be shipped. As you said, we can always refine it later :-)

[langpavel]

I'm adding nested MarkDown support for block strings
See GraphQL Specification # Descriptions why

[langpavel]

Now I'm super excited 🍾

[langpavel]

I have a question @alexandrudima:
Can I mark entire nested language block with CSS class? The goal should be different (background/base) color for embedded language

[alexdima]

Unfortunately not, the background cannot be controlled from the tokens+themes at this time.

[alexdima]

Thank you!